Granite pegmatite, worked for a short period of time.
References
Cameron E.N.; Larabee, D.M.; McNair, A.H.; Page. J.J.; Stewart, G.W.; Shainin, V.E. (1954): Pegmatite Investigations 1942-1945, New England. (USGS Prof Paper 255:1-352.)
Whitmore, R.W. and Lawrence, R.C., Jr. (2004): The Pegmatite Mines Known As Palermo. Friends of Palermo Mines, North Groton, New Hampshire.
Mineral List
29 entries listed. 27 valid minerals.
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